ASCE Hazards Report
Address: Standard: ASCE/SEI 7-16 Latitude: 40.298986
21 Frick Ave Risk Category: II Longitude: -79.684629
Irwin, Pennsylvania
15642
Soil Class: D - Default (see Elevation: 1122.0915344961668 ft
Section 11.4.3) (NAVD 88)
Wind
Results:
Wind Speed 110 Vmph
10-year MRI 75 Vmph
25-year MRI 81 Vmph
50-year MRI 88 Vmph
100-year MRI 94 Vmph
Data Source: ASCE/SEI 7-16, Fig. 26.5-1B and Figs. CC.2-1–CC.2-4, and Section 26.5.2
Date Accessed: Wed May 14 2025
Value provided is 3-second gust wind speeds at 33 ft above ground for Exposure C Category, based on linear
interpolation between contours. Wind speeds are interpolated in accordance with the 7-16 Standard. Wind speeds
correspond to approximately a 7% probability of exceedance in 50 years (annual exceedance probability =
0.00143, MRI = 700 years).
Site is not in a hurricane-prone region as defined in ASCE/SEI 7-16 Section 26.2.
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Seismic
Site Soil Class: D - Default (see Section 11.4.3)
Results:
SS : 0.088 S D1 : 0.071
S1 : 0.044 TL : 12
Fa : 1.6 PGA : 0.042
Fv : 2.4 PGA M : 0.067
S MS : 0.141 F PGA : 1.6
S M1 : 0.107 Ie : 1
S DS : 0.094 Cv : 0.7
Seismic Design MCE R Response Spectrum
Category: B Design Response Spectrum
Sa (g) vs T(s) Sa (g) vs T(s)
MCER Vertical Response Spectrum Design Vertical Response Spectrum
Sa (g) vs T(s) Sa (g) vs T(s)
Data Accessed: Wed May 14 2025
Date Source:
USGS Seismic Design Maps based on ASCE/SEI 7-16 and ASCE/SEI 7-16 Table 1.5-2. Additional data for
site-specific ground motion procedures in accordance with ASCE/SEI 7-16 Ch. 21 are available from USGS.
https://ascehazardtool.org/ Page 2 of 3 Wed May 14 2025
Snow
Results:
Mapped Elevation: 1122.1 ft
Data Source: ASCE/SEI 7-16, Table 7.2-8
Date Accessed: Wed May 14 2025
In "Case Study" areas, site-specific case studies are required to establish ground snow loads. Extreme local
variations in ground snow loads in these areas preclude mapping at this scale.
Ground snow load determination for such sites shall be based on an extreme value statistical analysis of data
available in the vicinity of the site using a value with a 2 percent annual probability of being exceeded (50-year
mean recurrence interval).
Values provided are ground snow loads. In areas designated "case study
required," extreme local variations in ground snow loads preclude mapping at
this scale. Site-specific case studies are required to establish ground snow
loads at elevations not covered.
Snow load values are mapped to a 0.5 mile resolution. This resolution can
create a mismatch between the mapped elevation and the site-specific
elevation in topographically complex areas. Engineers should consult the local
authority having jurisdiction in locations where the reported ‘elevation’ and
‘mapped elevation’ differ significantly from each other.
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